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20037 Duke (1992 UW4)
Classification: Mars-crossing Asteroid          SPK-ID: 2020037
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 4 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1207711028125379 5.727e-08  
a 1.883767177820161 1.3888e-08 AU
q 1.656262538312758 1.0876e-07 AU
i 22.54247449004873 1.0169e-05 deg
node 228.6681043998119 1.5444e-05 deg
peri 95.48808599731206 4.3383e-05 deg
M 255.5257827638487 4.4015e-05 deg
tp 2457274.560149587943
(2015-Sep-09.06014959)
0.00011674 JED
period 944.363657003016
2.59
1.0443e-05
2.859e-08
d
yr
n .3812090790770978 4.2156e-09 deg/d
Q 2.111271817327565 1.5565e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      539  
   data-arc span      7753 days (21.23 yr)  
   first obs. used      1992-10-20  
   last obs. used      2014-01-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .44151  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-09 22:36:02  

Additional Information
 Earth MOID = .778901 AU 
 T_jup = 3.866 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.0 mag n/a MPO250411  
rotation period rot_per 5.428 h n/a Asteroid Lightcurve DataBase (Rev. 2014-Mar-01) Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Warner, B.D. (2011) Minor Planet Bul. 38, 33-36.]

20037 Duke           Discovered 1992 Oct. 20 by C. S. Shoemaker and E. M. Shoemaker at Palomar.
Michael B. Duke (b. 1935) is a scholar of distinction on lunar, Mars and meteorite research, with a broad perspective and knowledge of the history of space exploration. Curator of the lunar samples returned from the moon, he moved on to become chief of the Lunar and Planetary Sciences Division of the Johnson Spacecraft Center.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20030501/MPCPages.arcLast Updated: 2003-10-02
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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